Children’s science magazine Muse has dedicated almost its entire May/June 2019 issue to maps, with features on map projections (the new Equal Earth Projection is prominent), cartographers Marie Tharp and Tim Wallace, the Carta Marina, using maps in search and rescue, geocaching, and more. A lot of good stuff, accessible to young readers. The issue is not online, and not available yet via the back issues page, but it can be had via Apple News+ (which is how and where I saw it) or, presumably, on a newsstand somewhere. Subscriptions to Muse can be had via the publisher or Amazon.